40978263 has 4 divisors (see below), whose sum is σ = 54637688. Its totient is φ = 27318840.

The previous prime is 40978261. The next prime is 40978283. The reversal of 40978263 is 36287904.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40978263 - 2¹ = 40978261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40978261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6829708 + ... + 6829713.

It is an arithmetic number, because the mean of its divisors is an integer number (13659422).

Almost surely, 2^40978263 is an apocalyptic number.

40978263 is a deficient number, since it is larger than the sum of its proper divisors (13659425).

40978263 is a wasteful number, since it uses less digits than its factorization.

40978263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13659424.

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

The square root of 40978263 is about 6401.4266378675. The cubic root of 40978263 is about 344.7607751373.

The spelling of 40978263 in words is "forty million, nine hundred seventy-eight thousand, two hundred sixty-three".