31429900 has 18 divisors (see below), whose sum is σ = 68203100. Its totient is φ = 12571920.

The previous prime is 31429897. The next prime is 31429907. The reversal of 31429900 is 992413.

It is a happy number.

It is a super-2 number, since 2×31429900² = 1975677228020000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31429907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 157050 + ... + 157249.

Almost surely, 2^31429900 is an apocalyptic number.

It is an amenable number.

31429900 is an abundant number, since it is smaller than the sum of its proper divisors (36773200).

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

31429900 is a wasteful number, since it uses less digits than its factorization.

31429900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314313 (or 314306 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 31429900 is about 5606.2375975337. The cubic root of 31429900 is about 315.5835324406.

The spelling of 31429900 in words is "thirty-one million, four hundred twenty-nine thousand, nine hundred".