75128490 has 24 divisors (see below), whose sum is σ = 195334308. Its totient is φ = 20034240.

The previous prime is 75128483. The next prime is 75128497. The reversal of 75128490 is 9482157.

It is an interprime number because it is at equal distance from previous prime (75128483) and next prime (75128497).

It can be written as a sum of positive squares in 2 ways, for example, as 67125249 + 8003241 = 8193^2 + 2829^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75128497) 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, 417291 + ... + 417470.

Almost surely, 2^75128490 is an apocalyptic number.

75128490 is an abundant number, since it is smaller than the sum of its proper divisors (120205818).

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

75128490 is a wasteful number, since it uses less digits than its factorization.

75128490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834774 (or 834771 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 75128490 is about 8667.6692368825. The cubic root of 75128490 is about 421.9570233931.

It can be divided in two parts, 751 and 28490, that added together give a square (29241 = 171²).

The spelling of 75128490 in words is "seventy-five million, one hundred twenty-eight thousand, four hundred ninety".