252778077 has 36 divisors (see below), whose sum is σ = 385802144. Its totient is φ = 165385800.

The previous prime is 252778063. The next prime is 252778087. The reversal of 252778077 is 770877252.

It is a happy number.

252778077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 252778077 - 2⁶ = 252778013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252778087) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1673952 + ... + 1674102.

Almost surely, 2^252778077 is an apocalyptic number.

252778077 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

252778077 is a deficient number, since it is larger than the sum of its proper divisors (133024067).

252778077 is an frugal number, since it uses more digits than its factorization.

252778077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 384160, while the sum is 45.

The square root of 252778077 is about 15898.9961003832. The cubic root of 252778077 is about 632.2853730795.

The spelling of 252778077 in words is "two hundred fifty-two million, seven hundred seventy-eight thousand, seventy-seven".