402076778 has 8 divisors (see below), whose sum is σ = 605247168. Its totient is φ = 200327724.

The previous prime is 402076771. The next prime is 402076783. The reversal of 402076778 is 877670204.

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

It is a super-2 number, since 2×402076778² = 323331470813722568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402076771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354626 + ... + 355757.

It is an arithmetic number, because the mean of its divisors is an integer number (75655896).

Almost surely, 2^402076778 is an apocalyptic number.

402076778 is a deficient number, since it is larger than the sum of its proper divisors (203170390).

402076778 is a wasteful number, since it uses less digits than its factorization.

402076778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710668.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 402076778 is about 20051.8522336466. The cubic root of 402076778 is about 738.0792518255.

The spelling of 402076778 in words is "four hundred two million, seventy-six thousand, seven hundred seventy-eight".