1153915438 has 36 divisors (see below), whose sum is σ = 1899952848. Its totient is φ = 525370560.

The previous prime is 1153915361. The next prime is 1153915447. The reversal of 1153915438 is 8345193511.

It is a self number, because there is not a number n which added to its sum of digits gives 1153915438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2677083 + ... + 2677513.

It is an arithmetic number, because the mean of its divisors is an integer number (52776468).

Almost surely, 2^1153915438 is an apocalyptic number.

1153915438 is a deficient number, since it is larger than the sum of its proper divisors (746037410).

1153915438 is an equidigital number, since it uses as much as digits as its factorization.

1153915438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 535 counting only the distinct ones).

The product of its digits is 64800, while the sum is 40.

The square root of 1153915438 is about 33969.3308441600. The cubic root of 1153915438 is about 1048.8772391688.

The spelling of 1153915438 in words is "one billion, one hundred fifty-three million, nine hundred fifteen thousand, four hundred thirty-eight".