22787521428 has 48 divisors (see below), whose sum is σ = 60774715904. Its totient is φ = 6509864160.

The previous prime is 22787521411. The next prime is 22787521451. The reversal of 22787521428 is 82412578722.

It is a super-2 number, since 2×22787521428² (a number of 22 digits) contains 22 as substring.

It is a congruent 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, 910563 + ... + 935253.

Almost surely, 2^22787521428 is an apocalyptic number.

22787521428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22787521428 is an abundant number, since it is smaller than the sum of its proper divisors (37987194476).

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

22787521428 is a wasteful number, since it uses less digits than its factorization.

22787521428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35692 (or 35690 counting only the distinct ones).

The product of its digits is 1003520, while the sum is 48.

It can be divided in two parts, 2278752 and 1428, that added together give a triangular number (2280180 = T₂₁₃₅).

The spelling of 22787521428 in words is "twenty-two billion, seven hundred eighty-seven million, five hundred twenty-one thousand, four hundred twenty-eight".