1139001540 has 24 divisors (see below), whose sum is σ = 3189204480. Its totient is φ = 303733728.

The previous prime is 1139001529. The next prime is 1139001551. The reversal of 1139001540 is 451009311.

It is an interprime number because it is at equal distance from previous prime (1139001529) and next prime (1139001551).

It is a self number, because there is not a number n which added to its sum of digits gives 1139001540.

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, 9491620 + ... + 9491739.

It is an arithmetic number, because the mean of its divisors is an integer number (132883520).

Almost surely, 2^1139001540 is an apocalyptic number.

1139001540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1139001540 is an abundant number, since it is smaller than the sum of its proper divisors (2050202940).

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

1139001540 is a wasteful number, since it uses less digits than its factorization.

1139001540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18983371 (or 18983369 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1139001540 is about 33749.0968768055. The cubic root of 1139001540 is about 1044.3388566952.

It can be divided in two parts, 113900 and 1540, that added together give a triangular number (115440 = T₄₈₀).

The spelling of 1139001540 in words is "one billion, one hundred thirty-nine million, one thousand, five hundred forty".