402064031 has 4 divisors (see below), whose sum is σ = 402272064. Its totient is φ = 401856000.

The previous prime is 402064027. The next prime is 402064037. The reversal of 402064031 is 130460204.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402064031 - 2² = 402064027 is a prime.

It is a super-2 number, since 2×402064031² = 323310970047937922, 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 = 402063994 and 402064012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402064037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101090 + ... + 104991.

It is an arithmetic number, because the mean of its divisors is an integer number (100568016).

Almost surely, 2^402064031 is an apocalyptic number.

402064031 is a deficient number, since it is larger than the sum of its proper divisors (208033).

402064031 is a wasteful number, since it uses less digits than its factorization.

402064031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208032.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 402064031 is about 20051.5343801915. The cubic root of 402064031 is about 738.0714519921.

The spelling of 402064031 in words is "four hundred two million, sixty-four thousand, thirty-one".