75240978 has 16 divisors (see below), whose sum is σ = 151566240. Its totient is φ = 24899616.

The previous prime is 75240967. The next prime is 75240983. The reversal of 75240978 is 87904257.

It is a super-2 number, since 2×75240978² = 11322409540792968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44275 + ... + 45942.

It is an arithmetic number, because the mean of its divisors is an integer number (9472890).

Almost surely, 2^75240978 is an apocalyptic number.

75240978 is an abundant number, since it is smaller than the sum of its proper divisors (76325262).

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

75240978 is a wasteful number, since it uses less digits than its factorization.

75240978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90361.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 75240978 is about 8674.1557514262. The cubic root of 75240978 is about 422.1675135897.

The spelling of 75240978 in words is "seventy-five million, two hundred forty thousand, nine hundred seventy-eight".