61089090 has 32 divisors (see below), whose sum is σ = 146905920. Its totient is φ = 16257984.

The previous prime is 61089089. The next prime is 61089107. The reversal of 61089090 is 9098016.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15876 + ... + 19344.

It is an arithmetic number, because the mean of its divisors is an integer number (4590810).

Almost surely, 2^61089090 is an apocalyptic number.

61089090 is an abundant number, since it is smaller than the sum of its proper divisors (85816830).

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

61089090 is a wasteful number, since it uses less digits than its factorization.

61089090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 61089090 is about 7815.9509977993. The cubic root of 61089090 is about 393.8412658183.

The spelling of 61089090 in words is "sixty-one million, eighty-nine thousand, ninety".