61620630 has 16 divisors (see below), whose sum is σ = 147889584. Its totient is φ = 16432160.

The previous prime is 61620617. The next prime is 61620649. The reversal of 61620630 is 3602616.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 61620630.

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, 1026981 + ... + 1027040.

It is an arithmetic number, because the mean of its divisors is an integer number (9243099).

Almost surely, 2^61620630 is an apocalyptic number.

61620630 is an abundant number, since it is smaller than the sum of its proper divisors (86268954).

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

61620630 is a wasteful number, since it uses less digits than its factorization.

61620630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054031.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 61620630 is about 7849.8808908161. The cubic root of 61620630 is about 394.9802479040.

The spelling of 61620630 in words is "sixty-one million, six hundred twenty thousand, six hundred thirty".