402845231 has 8 divisors (see below), whose sum is σ = 408077040. Its totient is φ = 397622592.

The previous prime is 402845203. The next prime is 402845269. The reversal of 402845231 is 132548204.

It is a happy number.

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 402845231 - 2¹⁸ = 402583087 is a prime.

It is a super-2 number, since 2×402845231² = 324568560278886722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402845194 and 402845203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402845291) 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, 147131 + ... + 149843.

It is an arithmetic number, because the mean of its divisors is an integer number (51009630).

Almost surely, 2^402845231 is an apocalyptic number.

402845231 is a deficient number, since it is larger than the sum of its proper divisors (5231809).

402845231 is a wasteful number, since it uses less digits than its factorization.

402845231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4585.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 402845231 is about 20071.0047331966. The cubic root of 402845231 is about 738.5491606395.

The spelling of 402845231 in words is "four hundred two million, eight hundred forty-five thousand, two hundred thirty-one".