61343880 has 64 divisors (see below), whose sum is σ = 198192960. Its totient is φ = 15099648.

The previous prime is 61343869. The next prime is 61343881. The reversal of 61343880 is 8834316.

It is a super-2 number, since 2×61343880² = 7526143226908800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61343881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18102 + ... + 21221.

It is an arithmetic number, because the mean of its divisors is an integer number (3096765).

Almost surely, 2^61343880 is an apocalyptic number.

61343880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61343880 is an abundant number, since it is smaller than the sum of its proper divisors (136849080).

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

61343880 is a wasteful number, since it uses less digits than its factorization.

61343880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39350 (or 39346 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 61343880 is about 7832.2333979523. The cubic root of 61343880 is about 394.3880499213.

The spelling of 61343880 in words is "sixty-one million, three hundred forty-three thousand, eight hundred eighty".