902449638 has 12 divisors (see below), whose sum is σ = 1955307588. Its totient is φ = 300816540.

The previous prime is 902449619. The next prime is 902449661. The reversal of 902449638 is 836944209.

902449638 is a `hidden beast` number, since 9 + 0 + 2 + 4 + 4 + 9 + 638 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 902449593 and 902449602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25068028 + ... + 25068063.

It is an arithmetic number, because the mean of its divisors is an integer number (162942299).

Almost surely, 2^902449638 is an apocalyptic number.

902449638 is an abundant number, since it is smaller than the sum of its proper divisors (1052857950).

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

902449638 is a wasteful number, since it uses less digits than its factorization.

902449638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50136099 (or 50136096 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 902449638 is about 30040.7995566030. The cubic root of 902449638 is about 966.3645538398.

The spelling of 902449638 in words is "nine hundred two million, four hundred forty-nine thousand, six hundred thirty-eight".