74776381 has 16 divisors (see below), whose sum is σ = 82800000. Its totient is φ = 67212288.

The previous prime is 74776379. The next prime is 74776393. The reversal of 74776381 is 18367747.

It is a cyclic number.

It is not a de Polignac number, because 74776381 - 2¹ = 74776379 is a prime.

It is a super-2 number, since 2×74776381² = 11183014310914322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74779381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59245 + ... + 60493.

It is an arithmetic number, because the mean of its divisors is an integer number (5175000).

Almost surely, 2^74776381 is an apocalyptic number.

It is an amenable number.

74776381 is a deficient number, since it is larger than the sum of its proper divisors (8023619).

74776381 is a wasteful number, since it uses less digits than its factorization.

74776381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428.

The product of its digits is 197568, while the sum is 43.

The square root of 74776381 is about 8647.3337509316. Note that the first 3 decimals coincide. The cubic root of 74776381 is about 421.2967874726.

It can be divided in two parts, 74776 and 381, that added together give a palindrome (75157).

The spelling of 74776381 in words is "seventy-four million, seven hundred seventy-six thousand, three hundred eighty-one".