1947142872 has 48 divisors (see below), whose sum is σ = 5583722040. Its totient is φ = 610867968.

The previous prime is 1947142843. The next prime is 1947142907. The reversal of 1947142872 is 2782417491.

1947142872 is a `hidden beast` number, since 1 + 94 + 71 + 428 + 72 = 666.

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, 794178 + ... + 796625.

Almost surely, 2^1947142872 is an apocalyptic number.

1947142872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1947142872 is an abundant number, since it is smaller than the sum of its proper divisors (3636579168).

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

1947142872 is a wasteful number, since it uses less digits than its factorization.

1947142872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590832 (or 1590825 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 1947142872 is about 44126.4418687934. The cubic root of 1947142872 is about 1248.7225075485.

The spelling of 1947142872 in words is "one billion, nine hundred forty-seven million, one hundred forty-two thousand, eight hundred seventy-two".