39946572 has 72 divisors (see below), whose sum is σ = 105945840. Its totient is φ = 12673920.

The previous prime is 39946553. The next prime is 39946591. The reversal of 39946572 is 27564993.

It is a happy number.

39946572 is a `hidden beast` number, since 39 + 9 + 46 + 572 = 666.

It is an interprime number because it is at equal distance from previous prime (39946553) and next prime (39946591).

It is a super-2 number, since 2×39946572² = 3191457229102368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86422 + ... + 86882.

It is an arithmetic number, because the mean of its divisors is an integer number (1471470).

Almost surely, 2^39946572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39946572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52972920).

39946572 is an abundant number, since it is smaller than the sum of its proper divisors (65999268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39946572 is a wasteful number, since it uses less digits than its factorization.

39946572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583 (or 578 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 39946572 is about 6320.3300546728. The cubic root of 39946572 is about 341.8428538322.

It can be divided in two parts, 399 and 46572, that added together give a triangular number (46971 = T₃₀₆).

The spelling of 39946572 in words is "thirty-nine million, nine hundred forty-six thousand, five hundred seventy-two".