402893478 has 24 divisors (see below), whose sum is σ = 940085328. Its totient is φ = 123967152.

The previous prime is 402893419. The next prime is 402893479. The reversal of 402893478 is 874398204.

It is a super-2 number, since 2×402893478² = 324646309229872968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402893479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 860650 + ... + 861117.

It is an arithmetic number, because the mean of its divisors is an integer number (39170222).

Almost surely, 2^402893478 is an apocalyptic number.

402893478 is an abundant number, since it is smaller than the sum of its proper divisors (537191850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402893478 is a wasteful number, since it uses less digits than its factorization.

402893478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721788 (or 1721785 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 402893478 is about 20072.2066051543. The cubic root of 402893478 is about 738.5786437231.

The spelling of 402893478 in words is "four hundred two million, eight hundred ninety-three thousand, four hundred seventy-eight".