88440389 has 2 divisors, whose sum is σ = 88440390. Its totient is φ = 88440388.

The previous prime is 88440367. The next prime is 88440413. The reversal of 88440389 is 98304488.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51595489 + 36844900 = 7183^2 + 6070^2 .

It is a cyclic number.

It is not a de Polignac number, because 88440389 - 2²⁰ = 87391813 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88440349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44220194 + 44220195.

It is an arithmetic number, because the mean of its divisors is an integer number (44220195).

Almost surely, 2^88440389 is an apocalyptic number.

It is an amenable number.

88440389 is a deficient number, since it is larger than the sum of its proper divisors (1).

88440389 is an equidigital number, since it uses as much as digits as its factorization.

88440389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 88440389 is about 9404.2750385131. The cubic root of 88440389 is about 445.5367659105.

The spelling of 88440389 in words is "eighty-eight million, four hundred forty thousand, three hundred eighty-nine".