39397680 has 120 divisors (see below), whose sum is σ = 151231392. Its totient is φ = 9004032.

The previous prime is 39397667. The next prime is 39397681. The reversal of 39397680 is 8679393.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (39397681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1132 + ... + 8948.

Almost surely, 2^39397680 is an apocalyptic number.

39397680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39397680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75615696).

39397680 is an abundant number, since it is smaller than the sum of its proper divisors (111833712).

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

39397680 is a wasteful number, since it uses less digits than its factorization.

39397680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7843 (or 7834 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 39397680 is about 6276.7571245031. The cubic root of 39397680 is about 340.2699125447.

The spelling of 39397680 in words is "thirty-nine million, three hundred ninety-seven thousand, six hundred eighty".