88781445 has 12 divisors (see below), whose sum is σ = 153887916. Its totient is φ = 47350080.

The previous prime is 88781437. The next prime is 88781447. The reversal of 88781445 is 54418788.

It can be written as a sum of positive squares in 2 ways, for example, as 62062884 + 26718561 = 7878^2 + 5169^2 .

It is not a de Polignac number, because 88781445 - 2³ = 88781437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1972921 = 88781445 / (8 + 8 + 7 + 8 + 1 + 4 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 88781445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88781447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 986416 + ... + 986505.

It is an arithmetic number, because the mean of its divisors is an integer number (12823993).

Almost surely, 2^88781445 is an apocalyptic number.

It is an amenable number.

88781445 is a deficient number, since it is larger than the sum of its proper divisors (65106471).

88781445 is a wasteful number, since it uses less digits than its factorization.

88781445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972932 (or 1972929 counting only the distinct ones).

The product of its digits is 286720, while the sum is 45.

The square root of 88781445 is about 9422.3906202195. The cubic root of 88781445 is about 446.1087446901.

The spelling of 88781445 in words is "eighty-eight million, seven hundred eighty-one thousand, four hundred forty-five".