61630436 has 18 divisors (see below), whose sum is σ = 125462358. Its totient is φ = 26412960.

The previous prime is 61630411. The next prime is 61630441. The reversal of 61630436 is 63403616.

61630436 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 61465600 + 164836 = 7840^2 + 406^2 .

61630436 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 61630399 and 61630408.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 157025 + ... + 157416.

It is an arithmetic number, because the mean of its divisors is an integer number (6970131).

Almost surely, 2^61630436 is an apocalyptic number.

It is an amenable number.

61630436 is an abundant number, since it is smaller than the sum of its proper divisors (63831922).

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

61630436 is a wasteful number, since it uses less digits than its factorization.

61630436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314459 (or 314450 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 61630436 is about 7850.5054614337. The cubic root of 61630436 is about 395.0011985222.

The spelling of 61630436 in words is "sixty-one million, six hundred thirty thousand, four hundred thirty-six".