402681489 has 16 divisors (see below), whose sum is σ = 619043712. Its totient is φ = 228066048.

The previous prime is 402681469. The next prime is 402681511. The reversal of 402681489 is 984186204.

It is not a de Polignac number, because 402681489 - 2⁷ = 402681361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402681489.

It is not an unprimeable number, because it can be changed into a prime (402681449) 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, 82474 + ... + 87219.

It is an arithmetic number, because the mean of its divisors is an integer number (38690232).

Almost surely, 2^402681489 is an apocalyptic number.

It is an amenable number.

402681489 is a deficient number, since it is larger than the sum of its proper divisors (216362223).

402681489 is a wasteful number, since it uses less digits than its factorization.

402681489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169816.

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 402681489 is about 20066.9252502719. The cubic root of 402681489 is about 738.4490825815.

The spelling of 402681489 in words is "four hundred two million, six hundred eighty-one thousand, four hundred eighty-nine".