1491995460 has 24 divisors (see below), whose sum is σ = 4177587456. Its totient is φ = 397865440.

The previous prime is 1491995447. The next prime is 1491995473. The reversal of 1491995460 is 645991941.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1491995447) and next prime (1491995473).

It is a super-2 number, since 2×1491995460² = 4452100905321223200, which contains 22 as substring.

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, 12433236 + ... + 12433355.

It is an arithmetic number, because the mean of its divisors is an integer number (174066144).

Almost surely, 2^1491995460 is an apocalyptic number.

1491995460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1491995460 is an abundant number, since it is smaller than the sum of its proper divisors (2685591996).

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

1491995460 is a wasteful number, since it uses less digits than its factorization.

1491995460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24866603 (or 24866601 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 1491995460 is about 38626.3570635389. The cubic root of 1491995460 is about 1142.6744073756.

The spelling of 1491995460 in words is "one billion, four hundred ninety-one million, nine hundred ninety-five thousand, four hundred sixty".