74981970 has 128 divisors (see below), whose sum is σ = 231436800. Its totient is φ = 16920576.

The previous prime is 74981969. The next prime is 74982013. The reversal of 74981970 is 7918947.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 183126 + ... + 183534.

It is an arithmetic number, because the mean of its divisors is an integer number (1808100).

Almost surely, 2^74981970 is an apocalyptic number.

74981970 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 74981970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115718400).

74981970 is an abundant number, since it is smaller than the sum of its proper divisors (156454830).

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

74981970 is a wasteful number, since it uses less digits than its factorization.

74981970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 74981970 is about 8659.2130127397. The cubic root of 74981970 is about 421.6825364071.

The spelling of 74981970 in words is "seventy-four million, nine hundred eighty-one thousand, nine hundred seventy".