780042744 has 64 divisors (see below), whose sum is σ = 2333469600. Its totient is φ = 240012288.

The previous prime is 780042737. The next prime is 780042749. The reversal of 780042744 is 447240087.

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 = 780042699 and 780042708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780042749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136089 + ... + 141704.

Almost surely, 2^780042744 is an apocalyptic number.

It is an amenable number.

780042744 is an abundant number, since it is smaller than the sum of its proper divisors (1553426856).

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

780042744 is a wasteful number, since it uses less digits than its factorization.

780042744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277821 (or 277811 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 780042744 is about 27929.2453174088. The cubic root of 780042744 is about 920.5332227108.

The spelling of 780042744 in words is "seven hundred eighty million, forty-two thousand, seven hundred forty-four".