1156837940 has 24 divisors (see below), whose sum is σ = 2430417192. Its totient is φ = 462533760.

The previous prime is 1156837939. The next prime is 1156837951. The reversal of 1156837940 is 497386511.

It can be written as a sum of positive squares in 4 ways, for example, as 374964496 + 781873444 = 19364^2 + 27962^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1156837891 and 1156837900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39830 + ... + 62450.

It is an arithmetic number, because the mean of its divisors is an integer number (101267383).

Almost surely, 2^1156837940 is an apocalyptic number.

1156837940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1156837940 is an abundant number, since it is smaller than the sum of its proper divisors (1273579252).

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

1156837940 is a wasteful number, since it uses less digits than its factorization.

1156837940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25187 (or 25185 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 1156837940 is about 34012.3204148144. The cubic root of 1156837940 is about 1049.7619838430.

The spelling of 1156837940 in words is "one billion, one hundred fifty-six million, eight hundred thirty-seven thousand, nine hundred forty".