75042778 has 8 divisors (see below), whose sum is σ = 116445780. Its totient is φ = 36227520.

The previous prime is 75042769. The next prime is 75042787. The reversal of 75042778 is 87724057.

It is an interprime number because it is at equal distance from previous prime (75042769) and next prime (75042787).

It can be written as a sum of positive squares in 2 ways, for example, as 74528689 + 514089 = 8633^2 + 717^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 75042778.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646863 + ... + 646978.

Almost surely, 2^75042778 is an apocalyptic number.

75042778 is a deficient number, since it is larger than the sum of its proper divisors (41403002).

75042778 is a wasteful number, since it uses less digits than its factorization.

75042778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293872.

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 75042778 is about 8662.7234747509. The cubic root of 75042778 is about 421.7964959953.

The spelling of 75042778 in words is "seventy-five million, forty-two thousand, seven hundred seventy-eight".