253763408 has 10 divisors (see below), whose sum is σ = 491666634. Its totient is φ = 126881696.

The previous prime is 253763401. The next prime is 253763413. The reversal of 253763408 is 804367352.

It can be written as a sum of positive squares in only one way, i.e., 235683904 + 18079504 = 15352^2 + 4252^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253763401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7930091 + ... + 7930122.

Almost surely, 2^253763408 is an apocalyptic number.

It is an amenable number.

253763408 is a deficient number, since it is larger than the sum of its proper divisors (237903226).

253763408 is a wasteful number, since it uses less digits than its factorization.

253763408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15860221 (or 15860215 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 253763408 is about 15929.9531700504. The cubic root of 253763408 is about 633.1058590897.

The spelling of 253763408 in words is "two hundred fifty-three million, seven hundred sixty-three thousand, four hundred eight".