89783978 has 16 divisors (see below), whose sum is σ = 138883464. Its totient is φ = 43499520.

The previous prime is 89783977. The next prime is 89784011. The reversal of 89783978 is 87938798.

It can be written as a sum of positive squares in 4 ways, for example, as 86731969 + 3052009 = 9313^2 + 1747^2 .

It is a super-2 number, since 2×89783978² = 16122325411008968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (89783977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16658 + ... + 21378.

Almost surely, 2^89783978 is an apocalyptic number.

89783978 is a deficient number, since it is larger than the sum of its proper divisors (49099486).

89783978 is a wasteful number, since it uses less digits than its factorization.

89783978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5017.

The product of its digits is 6096384, while the sum is 59.

The square root of 89783978 is about 9475.4407813041. The cubic root of 89783978 is about 447.7816385094.

The spelling of 89783978 in words is "eighty-nine million, seven hundred eighty-three thousand, nine hundred seventy-eight".