1815282072 has 24 divisors (see below), whose sum is σ = 4916389140. Its totient is φ = 605094000.

The previous prime is 1815282043. The next prime is 1815282089. The reversal of 1815282072 is 2702825181.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×1815282072² = 6590498001849226368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12606054 + ... + 12606197.

Almost surely, 2^1815282072 is an apocalyptic number.

1815282072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1815282072 is an abundant number, since it is smaller than the sum of its proper divisors (3101107068).

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

1815282072 is a wasteful number, since it uses less digits than its factorization.

1815282072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25212263 (or 25212256 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 1815282072 is about 42606.1271649982. The cubic root of 1815282072 is about 1219.8732449157.

The spelling of 1815282072 in words is "one billion, eight hundred fifteen million, two hundred eighty-two thousand, seventy-two".