402978383 has 16 divisors (see below), whose sum is σ = 417384000. Its totient is φ = 388903680.

The previous prime is 402978349. The next prime is 402978419. The reversal of 402978383 is 383879204.

It is a cyclic number.

It is not a de Polignac number, because 402978383 - 2²⁸ = 134542927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402978283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1080185 + ... + 1080557.

It is an arithmetic number, because the mean of its divisors is an integer number (26086500).

Almost surely, 2^402978383 is an apocalyptic number.

402978383 is a deficient number, since it is larger than the sum of its proper divisors (14405617).

402978383 is a wasteful number, since it uses less digits than its factorization.

402978383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 402978383 is about 20074.3214829294. The cubic root of 402978383 is about 738.6305222954.

The spelling of 402978383 in words is "four hundred two million, nine hundred seventy-eight thousand, three hundred eighty-three".