742801778 has 8 divisors (see below), whose sum is σ = 1116789120. Its totient is φ = 370538740.

The previous prime is 742801769. The next prime is 742801781. The reversal of 742801778 is 877108247.

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

It is a super-2 number, since 2×742801778² = 1103508962799922568, which contains 22 as substring.

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, 429998 + ... + 431721.

It is an arithmetic number, because the mean of its divisors is an integer number (139598640).

Almost surely, 2^742801778 is an apocalyptic number.

742801778 is a deficient number, since it is larger than the sum of its proper divisors (373987342).

742801778 is a wasteful number, since it uses less digits than its factorization.

742801778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862152.

The product of its (nonzero) digits is 175616, while the sum is 44.

The square root of 742801778 is about 27254.3900683908. The cubic root of 742801778 is about 905.6442724668.

The spelling of 742801778 in words is "seven hundred forty-two million, eight hundred one thousand, seven hundred seventy-eight".