75489390 has 24 divisors (see below), whose sum is σ = 196272648. Its totient is φ = 20130480.

The previous prime is 75489389. The next prime is 75489397. The reversal of 75489390 is 9398457.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75489397) 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, 419296 + ... + 419475.

It is an arithmetic number, because the mean of its divisors is an integer number (8178027).

Almost surely, 2^75489390 is an apocalyptic number.

75489390 is an abundant number, since it is smaller than the sum of its proper divisors (120783258).

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

75489390 is a wasteful number, since it uses less digits than its factorization.

75489390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838784 (or 838781 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 75489390 is about 8688.4630401470. The cubic root of 75489390 is about 422.6316058858.

The spelling of 75489390 in words is "seventy-five million, four hundred eighty-nine thousand, three hundred ninety".