1253902638 has 64 divisors (see below), whose sum is σ = 2728028160. Its totient is φ = 383023872.

The previous prime is 1253902621. The next prime is 1253902679. The reversal of 1253902638 is 8362093521.

It is a junction number, because it is equal to n+sod(n) for n = 1253902596 and 1253902605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 547131 + ... + 549417.

It is an arithmetic number, because the mean of its divisors is an integer number (42625440).

Almost surely, 2^1253902638 is an apocalyptic number.

1253902638 is an abundant number, since it is smaller than the sum of its proper divisors (1474125522).

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

1253902638 is a wasteful number, since it uses less digits than its factorization.

1253902638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 1253902638 is about 35410.4876837357. The cubic root of 1253902638 is about 1078.3372441657.

The spelling of 1253902638 in words is "one billion, two hundred fifty-three million, nine hundred two thousand, six hundred thirty-eight".