61140090 has 48 divisors (see below), whose sum is σ = 161298144. Its totient is φ = 14820960.

The previous prime is 61140071. The next prime is 61140097. The reversal of 61140090 is 9004116.

It is a super-2 number, since 2×61140090² = 7476221210416200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61140097) 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, 4792 + ... + 12051.

It is an arithmetic number, because the mean of its divisors is an integer number (3360378).

Almost surely, 2^61140090 is an apocalyptic number.

61140090 is an abundant number, since it is smaller than the sum of its proper divisors (100158054).

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

61140090 is a wasteful number, since it uses less digits than its factorization.

61140090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16875 (or 16864 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 61140090 is about 7819.2128759869. The cubic root of 61140090 is about 393.9508343059.

The spelling of 61140090 in words is "sixty-one million, one hundred forty thousand, ninety".