74298690 has 48 divisors (see below), whose sum is σ = 194286456. Its totient is φ = 19699200.

The previous prime is 74298677. The next prime is 74298691. The reversal of 74298690 is 9689247.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 29582721 + 44715969 = 5439^2 + 6687^2 .

It is a super-2 number, since 2×74298690² = 11040590671432200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74298691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14010 + ... + 18570.

Almost surely, 2^74298690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74298690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97143228).

74298690 is an abundant number, since it is smaller than the sum of its proper divisors (119987766).

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

74298690 is a wasteful number, since it uses less digits than its factorization.

74298690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4755 (or 4752 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 74298690 is about 8619.6687871403. The cubic root of 74298690 is about 420.3977524494.

The spelling of 74298690 in words is "seventy-four million, two hundred ninety-eight thousand, six hundred ninety".