40779999 has 12 divisors (see below), whose sum is σ = 63435736. Its totient is φ = 25095312.

The previous prime is 40779967. The next prime is 40780001. The reversal of 40779999 is 99997704.

It is not a de Polignac number, because 40779999 - 2⁵ = 40779967 is a prime.

40779999 is a modest number, since divided by 9999 gives 4077 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40779929) 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, 174157 + ... + 174390.

Almost surely, 2^40779999 is an apocalyptic number.

40779999 is a deficient number, since it is larger than the sum of its proper divisors (22655737).

40779999 is a wasteful number, since it uses less digits than its factorization.

40779999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348566 (or 348563 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 54.

The square root of 40779999 is about 6385.9219381386. The cubic root of 40779999 is about 344.2038604835.

The spelling of 40779999 in words is "forty million, seven hundred seventy-nine thousand, nine hundred ninety-nine".