74490 has 32 divisors (see below), whose sum is σ = 193536. Its totient is φ = 18240.

The previous prime is 74489. The next prime is 74507. The reversal of 74490 is 9447.

It is a self number, because there is not a number n which added to its sum of digits gives 74490.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295 + ... + 485.

It is an arithmetic number, because the mean of its divisors is an integer number (6048).

2⁷⁴⁴⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96768).

74490 is an abundant number, since it is smaller than the sum of its proper divisors (119046).

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

74490 is a wasteful number, since it uses less digits than its factorization.

74490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 74490 is about 272.9285620817. The cubic root of 74490 is about 42.0758267390.

The spelling of 74490 in words is "seventy-four thousand, four hundred ninety".