61889090 has 32 divisors (see below), whose sum is σ = 119097216. Its totient is φ = 23098240.

The previous prime is 61889059. The next prime is 61889101. The reversal of 61889090 is 9098816.

It is a super-2 number, since 2×61889090² = 7660518922056200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6149 + ... + 12711.

It is an arithmetic number, because the mean of its divisors is an integer number (3721788).

Almost surely, 2^61889090 is an apocalyptic number.

61889090 is a deficient number, since it is larger than the sum of its proper divisors (57208126).

61889090 is a wasteful number, since it uses less digits than its factorization.

61889090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6634.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 61889090 is about 7866.9619294871. The cubic root of 61889090 is about 395.5530148539.

The spelling of 61889090 in words is "sixty-one million, eight hundred eighty-nine thousand, ninety".