764820542 has 4 divisors (see below), whose sum is σ = 1147230816. Its totient is φ = 382410270.

The previous prime is 764820479. The next prime is 764820557. The reversal of 764820542 is 245028467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245028467 = 37 ⋅6622391.

It is a super-2 number, since 2×764820542² = 1169900922930347528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 764820496 and 764820505.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 191205134 + ... + 191205137.

It is an arithmetic number, because the mean of its divisors is an integer number (286807704).

Almost surely, 2^764820542 is an apocalyptic number.

764820542 is a deficient number, since it is larger than the sum of its proper divisors (382410274).

764820542 is a wasteful number, since it uses less digits than its factorization.

764820542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382410273.

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 764820542 is about 27655.3890227565. The cubic root of 764820542 is about 914.5059062130.

The spelling of 764820542 in words is "seven hundred sixty-four million, eight hundred twenty thousand, five hundred forty-two".