385480781 has 4 divisors (see below), whose sum is σ = 440549472. Its totient is φ = 330412092.

The previous prime is 385480769. The next prime is 385480783. The reversal of 385480781 is 187084583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 385480781 - 2²⁶ = 318371917 is a prime.

It is a super-2 number, since 2×385480781² = 297190865040739922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385480783) 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, 27534335 + ... + 27534348.

It is an arithmetic number, because the mean of its divisors is an integer number (110137368).

Almost surely, 2^385480781 is an apocalyptic number.

It is an amenable number.

385480781 is a deficient number, since it is larger than the sum of its proper divisors (55068691).

385480781 is an equidigital number, since it uses as much as digits as its factorization.

385480781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55068690.

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 385480781 is about 19633.6644822101. The cubic root of 385480781 is about 727.7813296116.

The spelling of 385480781 in words is "three hundred eighty-five million, four hundred eighty thousand, seven hundred eighty-one".