402397039 has 8 divisors (see below), whose sum is σ = 439240320. Its totient is φ = 365597400.

The previous prime is 402397027. The next prime is 402397043. The reversal of 402397039 is 930793204.

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 402397039 - 2¹⁵ = 402364271 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402396989 and 402397007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402397049) 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, 10152 + ... + 30130.

It is an arithmetic number, because the mean of its divisors is an integer number (54905040).

Almost surely, 2^402397039 is an apocalyptic number.

402397039 is a deficient number, since it is larger than the sum of its proper divisors (36843281).

402397039 is a wasteful number, since it uses less digits than its factorization.

402397039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21821.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 402397039 is about 20059.8364649366. The cubic root of 402397039 is about 738.2751640494.

It can be divided in two parts, 40239 and 7039, that added together give a triangular number (47278 = T₃₀₇).

The spelling of 402397039 in words is "four hundred two million, three hundred ninety-seven thousand, thirty-nine".