402889478 has 8 divisors (see below), whose sum is σ = 605057040. Its totient is φ = 201203800.

The previous prime is 402889469. The next prime is 402889481. The reversal of 402889478 is 874988204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×402889478² = 324639862966224968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118373 + ... + 121728.

It is an arithmetic number, because the mean of its divisors is an integer number (75632130).

Almost surely, 2^402889478 is an apocalyptic number.

402889478 is a deficient number, since it is larger than the sum of its proper divisors (202167562).

402889478 is a wasteful number, since it uses less digits than its factorization.

402889478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240942.

The product of its (nonzero) digits is 1032192, while the sum is 50.

The square root of 402889478 is about 20072.1069646413. The cubic root of 402889478 is about 738.5761994672.

The spelling of 402889478 in words is "four hundred two million, eight hundred eighty-nine thousand, four hundred seventy-eight".