402839451 has 48 divisors (see below), whose sum is σ = 689694720. Its totient is φ = 221719680.

The previous prime is 402839441. The next prime is 402839471. The reversal of 402839451 is 154938204.

It is not a de Polignac number, because 402839451 - 2²¹ = 400742299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (402839441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 610960 + ... + 611618.

It is an arithmetic number, because the mean of its divisors is an integer number (14368640).

Almost surely, 2^402839451 is an apocalyptic number.

402839451 is a deficient number, since it is larger than the sum of its proper divisors (286855269).

402839451 is a wasteful number, since it uses less digits than its factorization.

402839451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016 (or 1013 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 402839451 is about 20070.8607438744. The cubic root of 402839451 is about 738.5456284024.

The spelling of 402839451 in words is "four hundred two million, eight hundred thirty-nine thousand, four hundred fifty-one".