74378775 has 12 divisors (see below), whose sum is σ = 122973032. Its totient is φ = 39668640.

The previous prime is 74378743. The next prime is 74378779. The reversal of 74378775 is 57787347.

It is a happy number.

It is not a de Polignac number, because 74378775 - 2⁵ = 74378743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74378779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 495784 + ... + 495933.

Almost surely, 2^74378775 is an apocalyptic number.

74378775 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

74378775 is a deficient number, since it is larger than the sum of its proper divisors (48594257).

74378775 is a wasteful number, since it uses less digits than its factorization.

74378775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991730 (or 991725 counting only the distinct ones).

The product of its digits is 1152480, while the sum is 48.

The square root of 74378775 is about 8624.3130161190. The cubic root of 74378775 is about 420.5487441862.

The spelling of 74378775 in words is "seventy-four million, three hundred seventy-eight thousand, seven hundred seventy-five".