61257980 has 24 divisors (see below), whose sum is σ = 147019488. Its totient is φ = 21002688.

The previous prime is 61257979. The next prime is 61258009. The reversal of 61257980 is 8975216.

It is a super-2 number, since 2×61257980² = 7505080227360800, which contains 22 as substring.

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, 218639 + ... + 218918.

It is an arithmetic number, because the mean of its divisors is an integer number (6125812).

Almost surely, 2^61257980 is an apocalyptic number.

It is an amenable number.

61257980 is an abundant number, since it is smaller than the sum of its proper divisors (85761508).

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

61257980 is a wasteful number, since it uses less digits than its factorization.

61257980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437573 (or 437571 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 61257980 is about 7826.7477281435. The cubic root of 61257980 is about 394.2038763796.

The spelling of 61257980 in words is "sixty-one million, two hundred fifty-seven thousand, nine hundred eighty".