1522642440 has 64 divisors (see below), whose sum is σ = 4983197760. Its totient is φ = 369125120.

The previous prime is 1522642423. The next prime is 1522642453. The reversal of 1522642440 is 442462251.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1522642398 and 1522642407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575439 + ... + 578078.

It is an arithmetic number, because the mean of its divisors is an integer number (77862465).

Almost surely, 2^1522642440 is an apocalyptic number.

1522642440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1522642440 is an abundant number, since it is smaller than the sum of its proper divisors (3460555320).

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

1522642440 is a wasteful number, since it uses less digits than its factorization.

1522642440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153542 (or 1153538 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 1522642440 is about 39021.0512416055. The cubic root of 1522642440 is about 1150.4453070655.

The spelling of 1522642440 in words is "one billion, five hundred twenty-two million, six hundred forty-two thousand, four hundred forty".