2865690388 has 12 divisors (see below), whose sum is σ = 5470863552. Its totient is φ = 1302586520.

The previous prime is 2865690341. The next prime is 2865690389. The reversal of 2865690388 is 8830965682.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2865690389) 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, 32564620 + ... + 32564707.

It is an arithmetic number, because the mean of its divisors is an integer number (455905296).

Almost surely, 2^2865690388 is an apocalyptic number.

It is an amenable number.

2865690388 is a deficient number, since it is larger than the sum of its proper divisors (2605173164).

2865690388 is a wasteful number, since it uses less digits than its factorization.

2865690388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65129342 (or 65129340 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 55.

The square root of 2865690388 is about 53532.1435027592. The cubic root of 2865690388 is about 1420.3970304206.

It can be divided in two parts, 2865 and 690388, that added together give a triangular number (693253 = T₁₁₇₇).

The spelling of 2865690388 in words is "two billion, eight hundred sixty-five million, six hundred ninety thousand, three hundred eighty-eight".