1520220930840 has 160 divisors (see below), whose sum is σ = 5135310180000. Its totient is φ = 403354930176.

The previous prime is 1520220930743. The next prime is 1520220930847. The reversal of 1520220930840 is 480390220251.

It is a happy number.

1520220930840 is a `hidden beast` number, since 1 + 520 + 2 + 2 + 0 + 93 + 0 + 8 + 40 = 666.

It is a super-2 number, since 2×1520220930840² (a number of 25 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1520220930795 and 1520220930804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520220930847) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 534145 + ... + 1823664.

It is an arithmetic number, because the mean of its divisors is an integer number (32095688625).

Almost surely, 2^{1520220930840} is an apocalyptic number.

1520220930840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1520220930840 is an abundant number, since it is smaller than the sum of its proper divisors (3615089249160).

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

1520220930840 is a wasteful number, since it uses less digits than its factorization.

1520220930840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358031 (or 2358018 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 1520220930840 in words is "one trillion, five hundred twenty billion, two hundred twenty million, nine hundred thirty thousand, eight hundred forty".