40399776 has 192 divisors, whose sum is σ = 130636800. Its totient is φ = 12089088.

The previous prime is 40399759. The next prime is 40399783. The reversal of 40399776 is 67799304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 377515 + ... + 377621.

It is an arithmetic number, because the mean of its divisors is an integer number (680400).

Almost surely, 2^40399776 is an apocalyptic number.

40399776 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40399776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65318400).

40399776 is an abundant number, since it is smaller than the sum of its proper divisors (90237024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40399776 is a wasteful number, since it uses less digits than its factorization.

40399776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 40399776 is about 6356.0818119341. The cubic root of 40399776 is about 343.1307601529.

The spelling of 40399776 in words is "forty million, three hundred ninety-nine thousand, seven hundred seventy-six".