1622764572 has 96 divisors (see below), whose sum is σ = 4463418624. Its totient is φ = 452390400.

The previous prime is 1622764553. The next prime is 1622764579. The reversal of 1622764572 is 2754672261.

It is a super-2 number, since 2×1622764572² = 5266729712276686368, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622764579) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 566568 + ... + 569424.

It is an arithmetic number, because the mean of its divisors is an integer number (46493944).

Almost surely, 2^1622764572 is an apocalyptic number.

1622764572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1622764572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2231709312).

1622764572 is an abundant number, since it is smaller than the sum of its proper divisors (2840654052).

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

1622764572 is a wasteful number, since it uses less digits than its factorization.

1622764572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219 (or 3217 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 1622764572 is about 40283.5521273882. The cubic root of 1622764572 is about 1175.1279949899.

The spelling of 1622764572 in words is "one billion, six hundred twenty-two million, seven hundred sixty-four thousand, five hundred seventy-two".