61766240 has 24 divisors (see below), whose sum is σ = 145923120. Its totient is φ = 24706432.

The previous prime is 61766239. The next prime is 61766261. The reversal of 61766240 is 4266716.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 61766197 and 61766206.

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, 192860 + ... + 193179.

It is an arithmetic number, because the mean of its divisors is an integer number (6080130).

Almost surely, 2^61766240 is an apocalyptic number.

It is an amenable number.

61766240 is an abundant number, since it is smaller than the sum of its proper divisors (84156880).

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

61766240 is a wasteful number, since it uses less digits than its factorization.

61766240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386054 (or 386046 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 61766240 is about 7859.1500812747. The cubic root of 61766240 is about 395.2911169101.

The spelling of 61766240 in words is "sixty-one million, seven hundred sixty-six thousand, two hundred forty".