31438152 has 32 divisors (see below), whose sum is σ = 87328800. Its totient is φ = 10479312.

The previous prime is 31438133. The next prime is 31438153. The reversal of 31438152 is 25183413.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (31438153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72558 + ... + 72989.

It is an arithmetic number, because the mean of its divisors is an integer number (2729025).

Almost surely, 2^31438152 is an apocalyptic number.

It is an amenable number.

31438152 is an abundant number, since it is smaller than the sum of its proper divisors (55890648).

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

31438152 is a wasteful number, since it uses less digits than its factorization.

31438152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145562 (or 145552 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 31438152 is about 5606.9735151862. The cubic root of 31438152 is about 315.6111491095.

The spelling of 31438152 in words is "thirty-one million, four hundred thirty-eight thousand, one hundred fifty-two".