31402429 has 8 divisors (see below), whose sum is σ = 32827392. Its totient is φ = 29982480.

The previous prime is 31402409. The next prime is 31402471. The reversal of 31402429 is 92420413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31402429 - 2²³ = 23013821 is a prime.

It is a super-2 number, since 2×31402429² = 1972225094200082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31402409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18052 + ... + 19714.

It is an arithmetic number, because the mean of its divisors is an integer number (4103424).

Almost surely, 2^31402429 is an apocalyptic number.

It is an amenable number.

31402429 is a deficient number, since it is larger than the sum of its proper divisors (1424963).

31402429 is a wasteful number, since it uses less digits than its factorization.

31402429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 31402429 is about 5603.7870230764. The cubic root of 31402429 is about 315.4915613955.

The spelling of 31402429 in words is "thirty-one million, four hundred two thousand, four hundred twenty-nine".