74028391 has 2 divisors, whose sum is σ = 74028392. Its totient is φ = 74028390.

The previous prime is 74028371. The next prime is 74028419. The reversal of 74028391 is 19382047.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74028391 - 2⁵ = 74028359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74028301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37014195 + 37014196.

It is an arithmetic number, because the mean of its divisors is an integer number (37014196).

Almost surely, 2^74028391 is an apocalyptic number.

74028391 is a deficient number, since it is larger than the sum of its proper divisors (1).

74028391 is an equidigital number, since it uses as much as digits as its factorization.

74028391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 74028391 is about 8603.9753021496. The cubic root of 74028391 is about 419.8873299439.

The spelling of 74028391 in words is "seventy-four million, twenty-eight thousand, three hundred ninety-one".