74812220 has 72 divisors (see below), whose sum is σ = 184874256. Its totient is φ = 25353216.

The previous prime is 74812219. The next prime is 74812229. The reversal of 74812220 is 2221847.

It is a super-2 number, since 2×74812220² = 11193736522656800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74812220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74812229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94667 + ... + 95453.

It is an arithmetic number, because the mean of its divisors is an integer number (2567698).

Almost surely, 2^74812220 is an apocalyptic number.

74812220 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74812220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92437128).

74812220 is an abundant number, since it is smaller than the sum of its proper divisors (110062036).

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

74812220 is a wasteful number, since it uses less digits than its factorization.

74812220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 74812220 is about 8649.4057599352. The cubic root of 74812220 is about 421.3640834280.

The spelling of 74812220 in words is "seventy-four million, eight hundred twelve thousand, two hundred twenty".