385851778 has 16 divisors (see below), whose sum is σ = 625529016. Its totient is φ = 177448320.

The previous prime is 385851769. The next prime is 385851787. The reversal of 385851778 is 877158583.

It is an interprime number because it is at equal distance from previous prime (385851769) and next prime (385851787).

It can be written as a sum of positive squares in 4 ways, for example, as 153685609 + 232166169 = 12397^2 + 15237^2 .

It is a super-2 number, since 2×385851778² = 297763189171522568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19101 + ... + 33712.

Almost surely, 2^385851778 is an apocalyptic number.

385851778 is a deficient number, since it is larger than the sum of its proper divisors (239677238).

385851778 is a wasteful number, since it uses less digits than its factorization.

385851778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53109.

The product of its digits is 1881600, while the sum is 52.

The square root of 385851778 is about 19643.1101916168. The cubic root of 385851778 is about 728.0147334799.

The spelling of 385851778 in words is "three hundred eighty-five million, eight hundred fifty-one thousand, seven hundred seventy-eight".