523099890 has 64 divisors (see below), whose sum is σ = 1439953920. Its totient is φ = 134991360.

The previous prime is 523099861. The next prime is 523099897. The reversal of 523099890 is 98990325.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (523099897) 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, 22879 + ... + 39618.

It is an arithmetic number, because the mean of its divisors is an integer number (22499280).

Almost surely, 2^523099890 is an apocalyptic number.

523099890 is an abundant number, since it is smaller than the sum of its proper divisors (916854030).

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

523099890 is a wasteful number, since it uses less digits than its factorization.

523099890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62544 (or 62538 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 523099890 is about 22871.3770901535. The cubic root of 523099890 is about 805.7399109906.

The spelling of 523099890 in words is "five hundred twenty-three million, ninety-nine thousand, eight hundred ninety".