1531942672 has 80 divisors (see below), whose sum is σ = 3332967232. Its totient is φ = 677445120.

The previous prime is 1531942663. The next prime is 1531942691. The reversal of 1531942672 is 2762491351.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514147 + ... + 517117.

Almost surely, 2^1531942672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1531942672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1666483616).

1531942672 is an abundant number, since it is smaller than the sum of its proper divisors (1801024560).

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

1531942672 is a wasteful number, since it uses less digits than its factorization.

1531942672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3096 (or 3090 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 1531942672 is about 39140.0392437207. The cubic root of 1531942672 is about 1152.7828438288.

The spelling of 1531942672 in words is "one billion, five hundred thirty-one million, nine hundred forty-two thousand, six hundred seventy-two".