40777397 has 4 divisors (see below), whose sum is σ = 41235660. Its totient is φ = 40319136.

The previous prime is 40777349. The next prime is 40777409. The reversal of 40777397 is 79377704.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13256881 + 27520516 = 3641^2 + 5246^2 .

It is not a de Polignac number, because 40777397 - 2⁶ = 40777333 is a prime.

It is a super-2 number, since 2×40777397² = 3325592212191218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40777697) 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, 228998 + ... + 229175.

It is an arithmetic number, because the mean of its divisors is an integer number (10308915).

Almost surely, 2^40777397 is an apocalyptic number.

It is an amenable number.

40777397 is a deficient number, since it is larger than the sum of its proper divisors (458263).

40777397 is an equidigital number, since it uses as much as digits as its factorization.

40777397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458262.

The product of its (nonzero) digits is 259308, while the sum is 44.

The square root of 40777397 is about 6385.7182054958. The cubic root of 40777397 is about 344.1965395949.

The spelling of 40777397 in words is "forty million, seven hundred seventy-seven thousand, three hundred ninety-seven".