61870780 has 12 divisors (see below), whose sum is σ = 129928680. Its totient is φ = 24748304.

The previous prime is 61870751. The next prime is 61870789. The reversal of 61870780 is 8707816.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61870789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1546750 + ... + 1546789.

It is an arithmetic number, because the mean of its divisors is an integer number (10827390).

Almost surely, 2^61870780 is an apocalyptic number.

It is an amenable number.

61870780 is an abundant number, since it is smaller than the sum of its proper divisors (68057900).

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

61870780 is a wasteful number, since it uses less digits than its factorization.

61870780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093548 (or 3093546 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 61870780 is about 7865.7981158939. The cubic root of 61870780 is about 395.5140026464.

The spelling of 61870780 in words is "sixty-one million, eight hundred seventy thousand, seven hundred eighty".