88440413 has 2 divisors, whose sum is σ = 88440414. Its totient is φ = 88440412.

The previous prime is 88440389. The next prime is 88440433. The reversal of 88440413 is 31404488.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71284249 + 17156164 = 8443^2 + 4142^2 .

It is a cyclic number.

It is not a de Polignac number, because 88440413 - 2⁶ = 88440349 is a prime.

It is a super-2 number, since 2×88440413² = 15643413303221138, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 88440413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88440433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44220206 + 44220207.

It is an arithmetic number, because the mean of its divisors is an integer number (44220207).

Almost surely, 2^88440413 is an apocalyptic number.

It is an amenable number.

88440413 is a deficient number, since it is larger than the sum of its proper divisors (1).

88440413 is an equidigital number, since it uses as much as digits as its factorization.

88440413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 88440413 is about 9404.2763145284. The cubic root of 88440413 is about 445.5368062122.

The spelling of 88440413 in words is "eighty-eight million, four hundred forty thousand, four hundred thirteen".