61236690 has 64 divisors (see below), whose sum is σ = 154742400. Its totient is φ = 15486464.

The previous prime is 61236689. The next prime is 61236697. The reversal of 61236690 is 9663216.

It is a happy number.

It is a super-2 number, since 2×61236690² = 7499864404312200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61236697) 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, 50734 + ... + 51926.

It is an arithmetic number, because the mean of its divisors is an integer number (2417850).

Almost surely, 2^61236690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61236690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77371200).

61236690 is an abundant number, since it is smaller than the sum of its proper divisors (93505710).

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

61236690 is a wasteful number, since it uses less digits than its factorization.

61236690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 61236690 is about 7825.3875303400. The cubic root of 61236690 is about 394.1582030214.

The spelling of 61236690 in words is "sixty-one million, two hundred thirty-six thousand, six hundred ninety".