40777381 has 4 divisors (see below), whose sum is σ = 40800672. Its totient is φ = 40754092.

The previous prime is 40777349. The next prime is 40777409. The reversal of 40777381 is 18377704.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40777381 - 2⁵ = 40777349 is a prime.

It is a super-2 number, since 2×40777381² = 3325589602438322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40777381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40777301) 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, 8785 + ... + 12598.

It is an arithmetic number, because the mean of its divisors is an integer number (10200168).

Almost surely, 2^40777381 is an apocalyptic number.

It is an amenable number.

40777381 is a deficient number, since it is larger than the sum of its proper divisors (23291).

40777381 is a wasteful number, since it uses less digits than its factorization.

40777381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23290.

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 40777381 is about 6385.7169527000. The cubic root of 40777381 is about 344.1964945769.

The spelling of 40777381 in words is "forty million, seven hundred seventy-seven thousand, three hundred eighty-one".