74745540 has 36 divisors (see below), whose sum is σ = 226728684. Its totient is φ = 19932096.

The previous prime is 74745533. The next prime is 74745553. The reversal of 74745540 is 4554747.

74745540 is a `hidden beast` number, since 74 + 7 + 45 + 540 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10969344 + 63776196 = 3312^2 + 7986^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 74745495 and 74745504.

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 11 ways as a sum of consecutive naturals, for example, 207447 + ... + 207806.

It is an arithmetic number, because the mean of its divisors is an integer number (6298019).

Almost surely, 2^74745540 is an apocalyptic number.

It is an amenable number.

74745540 is an abundant number, since it is smaller than the sum of its proper divisors (151983144).

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

74745540 is a wasteful number, since it uses less digits than its factorization.

74745540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415268 (or 415263 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 36.

The square root of 74745540 is about 8645.5503005882. The cubic root of 74745540 is about 421.2388591946.

The spelling of 74745540 in words is "seventy-four million, seven hundred forty-five thousand, five hundred forty".