1622072172 has 24 divisors (see below), whose sum is σ = 4325526016. Its totient is φ = 463449168.

The previous prime is 1622072149. The next prime is 1622072201. The reversal of 1622072172 is 2712702261.

It is a super-2 number, since 2×1622072172² = 5262236262353595168, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9655108 + ... + 9655275.

Almost surely, 2^1622072172 is an apocalyptic number.

1622072172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1622072172 is an abundant number, since it is smaller than the sum of its proper divisors (2703453844).

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

1622072172 is a wasteful number, since it uses less digits than its factorization.

1622072172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19310397 (or 19310395 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 1622072172 is about 40274.9571321932. The cubic root of 1622072172 is about 1174.9608369624.

The spelling of 1622072172 in words is "one billion, six hundred twenty-two million, seventy-two thousand, one hundred seventy-two".