74287388 has 12 divisors (see below), whose sum is σ = 148574832. Its totient is φ = 31837440.

The previous prime is 74287387. The next prime is 74287391. The reversal of 74287388 is 88378247.

It is a happy number.

74287388 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74287387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1326533 + ... + 1326588.

It is an arithmetic number, because the mean of its divisors is an integer number (12381236).

Almost surely, 2^74287388 is an apocalyptic number.

It is an amenable number.

74287388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

74287388 is a wasteful number, since it uses less digits than its factorization.

74287388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2653132 (or 2653130 counting only the distinct ones).

The product of its digits is 602112, while the sum is 47.

The square root of 74287388 is about 8619.0131685710. The cubic root of 74287388 is about 420.3764349971.

The spelling of 74287388 in words is "seventy-four million, two hundred eighty-seven thousand, three hundred eighty-eight".