61840436 has 24 divisors (see below), whose sum is σ = 124842816. Its totient is φ = 26254080.

The previous prime is 61840409. The next prime is 61840447. The reversal of 61840436 is 63404816.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7325 + ... + 13316.

It is an arithmetic number, because the mean of its divisors is an integer number (5201784).

Almost surely, 2^61840436 is an apocalyptic number.

It is an amenable number.

61840436 is an abundant number, since it is smaller than the sum of its proper divisors (63002380).

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

61840436 is a wasteful number, since it uses less digits than its factorization.

61840436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20759 (or 20757 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 61840436 is about 7863.8690223070. The cubic root of 61840436 is about 395.4493332422.

The spelling of 61840436 in words is "sixty-one million, eight hundred forty thousand, four hundred thirty-six".