61504290 has 24 divisors (see below), whose sum is σ = 159911388. Its totient is φ = 16401120.

The previous prime is 61504271. The next prime is 61504297. The reversal of 61504290 is 9240516.

61504290 is a `hidden beast` number, since 615 + 0 + 42 + 9 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 60699681 + 804609 = 7791^2 + 897^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61504297) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 341601 + ... + 341780.

Almost surely, 2^61504290 is an apocalyptic number.

61504290 is an abundant number, since it is smaller than the sum of its proper divisors (98407098).

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

61504290 is a wasteful number, since it uses less digits than its factorization.

61504290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683394 (or 683391 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 61504290 is about 7842.4670863192. The cubic root of 61504290 is about 394.7315165317.

It can be divided in two parts, 6150 and 4290, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 61504290 in words is "sixty-one million, five hundred four thousand, two hundred ninety".