1139640654 has 32 divisors (see below), whose sum is σ = 2320214400. Its totient is φ = 373092192.

The previous prime is 1139640643. The next prime is 1139640703. The reversal of 1139640654 is 4560469311.

1139640654 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136237 + ... + 144359.

It is an arithmetic number, because the mean of its divisors is an integer number (72506700).

Almost surely, 2^1139640654 is an apocalyptic number.

1139640654 is an abundant number, since it is smaller than the sum of its proper divisors (1180573746).

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

1139640654 is a wasteful number, since it uses less digits than its factorization.

1139640654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8544.

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

The square root of 1139640654 is about 33758.5641578548. The cubic root of 1139640654 is about 1044.5341525339.

The spelling of 1139640654 in words is "one billion, one hundred thirty-nine million, six hundred forty thousand, six hundred fifty-four".