402449388 has 36 divisors (see below), whose sum is σ = 1032181080. Its totient is φ = 121953920.

The previous prime is 402449357. The next prime is 402449389. The reversal of 402449388 is 883944204.

It is not an unprimeable number, because it can be changed into a prime (402449389) 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, 137133 + ... + 140036.

Almost surely, 2^402449388 is an apocalyptic number.

It is an amenable number.

402449388 is an abundant number, since it is smaller than the sum of its proper divisors (629731692).

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

402449388 is a wasteful number, since it uses less digits than its factorization.

402449388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277198 (or 277185 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 402449388 is about 20061.1412437079. The cubic root of 402449388 is about 738.3071774483.

The spelling of 402449388 in words is "four hundred two million, four hundred forty-nine thousand, three hundred eighty-eight".