1491158940 has 24 divisors (see below), whose sum is σ = 4175245200. Its totient is φ = 397642368.

The previous prime is 1491158923. The next prime is 1491158957. The reversal of 1491158940 is 498511941.

It is an interprime number because it is at equal distance from previous prime (1491158923) and next prime (1491158957).

It is a junction number, because it is equal to n+sod(n) for n = 1491158892 and 1491158901.

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, 12426265 + ... + 12426384.

It is an arithmetic number, because the mean of its divisors is an integer number (173968550).

Almost surely, 2^1491158940 is an apocalyptic number.

1491158940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1491158940 is an abundant number, since it is smaller than the sum of its proper divisors (2684086260).

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

1491158940 is a wasteful number, since it uses less digits than its factorization.

1491158940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24852661 (or 24852659 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The square root of 1491158940 is about 38615.5271879072. The cubic root of 1491158940 is about 1142.4608122900.

The spelling of 1491158940 in words is "one billion, four hundred ninety-one million, one hundred fifty-eight thousand, nine hundred forty".