75139450 has 24 divisors (see below), whose sum is σ = 142133760. Its totient is φ = 29545200.

The previous prime is 75139399. The next prime is 75139451. The reversal of 75139450 is 5493157.

It is not an unprimeable number, because it can be changed into a prime (75139451) 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, 9786 + ... + 15685.

It is an arithmetic number, because the mean of its divisors is an integer number (5922240).

Almost surely, 2^75139450 is an apocalyptic number.

75139450 is a deficient number, since it is larger than the sum of its proper divisors (66994310).

75139450 is a wasteful number, since it uses less digits than its factorization.

75139450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25542 (or 25537 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 75139450 is about 8668.3014483808. The cubic root of 75139450 is about 421.9775412379.

The spelling of 75139450 in words is "seventy-five million, one hundred thirty-nine thousand, four hundred fifty".