31434399 has 40 divisors (see below), whose sum is σ = 50181120. Its totient is φ = 19563984.

The previous prime is 31434373. The next prime is 31434407. The reversal of 31434399 is 99343413.

It is not a de Polignac number, because 31434399 - 2¹⁶ = 31368863 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (34992) is a multiple of the sum of its prime divisors (432).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31434329) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 87382 + ... + 87740.

It is an arithmetic number, because the mean of its divisors is an integer number (1254528).

Almost surely, 2^31434399 is an apocalyptic number.

31434399 is a deficient number, since it is larger than the sum of its proper divisors (18746721).

31434399 is a wasteful number, since it uses less digits than its factorization.

31434399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441 (or 432 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 31434399 is about 5606.6388326697. The cubic root of 31434399 is about 315.5985896798.

The spelling of 31434399 in words is "thirty-one million, four hundred thirty-four thousand, three hundred ninety-nine".