47931390 has 96 divisors (see below), whose sum is σ = 136334016. Its totient is φ = 11612160.

The previous prime is 47931371. The next prime is 47931409. The reversal of 47931390 is 9313974.

It is an interprime number because it is at equal distance from previous prime (47931371) and next prime (47931409).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82782 + ... + 83358.

It is an arithmetic number, because the mean of its divisors is an integer number (1420146).

Almost surely, 2^47931390 is an apocalyptic number.

47931390 is the 3462-nd decagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47931390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68167008).

47931390 is an abundant number, since it is smaller than the sum of its proper divisors (88402626).

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

47931390 is a wasteful number, since it uses less digits than its factorization.

47931390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 47931390 is about 6923.2499593760. The cubic root of 47931390 is about 363.2508795492.

The spelling of 47931390 in words is "forty-seven million, nine hundred thirty-one thousand, three hundred ninety".