1523520090 has 48 divisors (see below), whose sum is σ = 4107868128. Its totient is φ = 406271376.

The previous prime is 1523520077. The next prime is 1523520091. The reversal of 1523520090 is 900253251.

1523520090 is a `hidden beast` number, since 1 + 52 + 3 + 520 + 0 + 90 = 666.

It is a super-2 number, since 2×1523520090² = 4642226929267216200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1523520091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 311052 + ... + 315911.

It is an arithmetic number, because the mean of its divisors is an integer number (85580586).

Almost surely, 2^1523520090 is an apocalyptic number.

1523520090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1523520090 is an abundant number, since it is smaller than the sum of its proper divisors (2584348038).

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

1523520090 is an equidigital number, since it uses as much as digits as its factorization.

1523520090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626985 (or 626973 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 1523520090 is about 39032.2954743889. The cubic root of 1523520090 is about 1150.6663032243. Note that the first 3 decimals are identical.

The spelling of 1523520090 in words is "one billion, five hundred twenty-three million, five hundred twenty thousand, ninety".