40387995 has 24 divisors (see below), whose sum is σ = 70997472. Its totient is φ = 21235200.

The previous prime is 40387973. The next prime is 40388003. The reversal of 40387995 is 59978304.

It is not a de Polignac number, because 40387995 - 2¹⁶ = 40322459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 40387995.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3126 + ... + 9515.

It is an arithmetic number, because the mean of its divisors is an integer number (2958228).

Almost surely, 2^40387995 is an apocalyptic number.

40387995 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40387995 is a deficient number, since it is larger than the sum of its proper divisors (30609477).

40387995 is a wasteful number, since it uses less digits than its factorization.

40387995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12723 (or 12720 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 40387995 is about 6355.1549941760. The cubic root of 40387995 is about 343.0974033963.

The spelling of 40387995 in words is "forty million, three hundred eighty-seven thousand, nine hundred ninety-five".