40279863 has 16 divisors (see below), whose sum is σ = 59185280. Its totient is φ = 24210144.

The previous prime is 40279861. The next prime is 40279871. The reversal of 40279863 is 36897204.

It is not a de Polignac number, because 40279863 - 2¹ = 40279861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40279861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10333 + ... + 13686.

It is an arithmetic number, because the mean of its divisors is an integer number (3699080).

Almost surely, 2^40279863 is an apocalyptic number.

40279863 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

40279863 is a deficient number, since it is larger than the sum of its proper divisors (18905417).

40279863 is a wasteful number, since it uses less digits than its factorization.

40279863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24078.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 40279863 is about 6346.6418679488. The cubic root of 40279863 is about 342.7909347106.

The spelling of 40279863 in words is "forty million, two hundred seventy-nine thousand, eight hundred sixty-three".