1971487260 has 36 divisors (see below), whose sum is σ = 5980178568. Its totient is φ = 525729888.

The previous prime is 1971487237. The next prime is 1971487283. The reversal of 1971487260 is 627841791.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1971487237) and next prime (1971487283).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5476174 + ... + 5476533.

Almost surely, 2^1971487260 is an apocalyptic number.

1971487260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1971487260 is an abundant number, since it is smaller than the sum of its proper divisors (4008691308).

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

1971487260 is a wasteful number, since it uses less digits than its factorization.

1971487260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10952722 (or 10952717 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 1971487260 is about 44401.4330849805. The cubic root of 1971487260 is about 1253.9050697733.

The spelling of 1971487260 in words is "one billion, nine hundred seventy-one million, four hundred eighty-seven thousand, two hundred sixty".