61860040 has 48 divisors (see below), whose sum is σ = 153000540. Its totient is φ = 22492800.

The previous prime is 61860031. The next prime is 61860061. The reversal of 61860040 is 4006816.

It can be written as a sum of positive squares in 2 ways, for example, as 61685316 + 174724 = 7854^2 + 418^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61859987 and 61860014.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1551 + ... + 11230.

Almost surely, 2^61860040 is an apocalyptic number.

It is an amenable number.

61860040 is an abundant number, since it is smaller than the sum of its proper divisors (91140500).

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

61860040 is a wasteful number, since it uses less digits than its factorization.

61860040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12814 (or 12799 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 61860040 is about 7865.1153837690. The cubic root of 61860040 is about 395.4911158804.

Adding to 61860040 its reverse (4006816), we get a palindrome (65866856).

The spelling of 61860040 in words is "sixty-one million, eight hundred sixty thousand, forty".