61490004 has 72 divisors (see below), whose sum is σ = 156008160. Its totient is φ = 18797184.

The previous prime is 61489979. The next prime is 61490021. The reversal of 61490004 is 40009416.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 312034 + ... + 312230.

It is an arithmetic number, because the mean of its divisors is an integer number (2166780).

Almost surely, 2^61490004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61490004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78004080).

61490004 is an abundant number, since it is smaller than the sum of its proper divisors (94518156).

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

61490004 is a wasteful number, since it uses less digits than its factorization.

61490004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 61490004 is about 7841.5562230976. The cubic root of 61490004 is about 394.7009518826.

The spelling of 61490004 in words is "sixty-one million, four hundred ninety thousand, four".