620109090 has 24 divisors (see below), whose sum is σ = 1612283868. Its totient is φ = 165362400.

The previous prime is 620109073. The next prime is 620109107. The reversal of 620109090 is 90901026.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (620109073) and next prime (620109107).

It can be written as a sum of positive squares in 2 ways, for example, as 599123529 + 20985561 = 24477^2 + 4581^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3444961 + ... + 3445140.

Almost surely, 2^620109090 is an apocalyptic number.

620109090 is an abundant number, since it is smaller than the sum of its proper divisors (992174778).

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

620109090 is a wasteful number, since it uses less digits than its factorization.

620109090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6890114 (or 6890111 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 620109090 is about 24901.9896795417. The cubic root of 620109090 is about 852.7519068200.

The spelling of 620109090 in words is "six hundred twenty million, one hundred nine thousand, ninety".