61047240 has 32 divisors (see below), whose sum is σ = 183142080. Its totient is φ = 16279232.

The previous prime is 61047227. The next prime is 61047263. The reversal of 61047240 is 4274016.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 61047240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254244 + ... + 254483.

It is an arithmetic number, because the mean of its divisors is an integer number (5723190).

Almost surely, 2^61047240 is an apocalyptic number.

61047240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61047240 is an abundant number, since it is smaller than the sum of its proper divisors (122094840).

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

61047240 is a wasteful number, since it uses less digits than its factorization.

61047240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508741 (or 508737 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 61047240 is about 7813.2733217263. The cubic root of 61047240 is about 393.7513096454.

The spelling of 61047240 in words is "sixty-one million, forty-seven thousand, two hundred forty".