61920080 has 20 divisors (see below), whose sum is σ = 143964372. Its totient is φ = 24768000.

The previous prime is 61920037. The next prime is 61920091. The reversal of 61920080 is 8002916.

It can be written as a sum of positive squares in 2 ways, for example, as 9096256 + 52823824 = 3016^2 + 7268^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386921 + ... + 387080.

Almost surely, 2^61920080 is an apocalyptic number.

It is an amenable number.

61920080 is an abundant number, since it is smaller than the sum of its proper divisors (82044292).

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

61920080 is a wasteful number, since it uses less digits than its factorization.

61920080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774014 (or 774008 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 61920080 is about 7868.9313124464. The cubic root of 61920080 is about 395.6190261787.

Adding to 61920080 its reverse (8002916), we get a palindrome (69922996).

The spelling of 61920080 in words is "sixty-one million, nine hundred twenty thousand, eighty".