40697836 has 12 divisors (see below), whose sum is σ = 71584128. Its totient is φ = 20245232.

The previous prime is 40697821. The next prime is 40697837. The reversal of 40697836 is 63879604.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 40697792 and 40697801.

It is not an unprimeable number, because it can be changed into a prime (40697837) 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, 25036 + ... + 26611.

It is an arithmetic number, because the mean of its divisors is an integer number (5965344).

Almost surely, 2^40697836 is an apocalyptic number.

It is an amenable number.

40697836 is a deficient number, since it is larger than the sum of its proper divisors (30886292).

40697836 is a wasteful number, since it uses less digits than its factorization.

40697836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51848 (or 51846 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 40697836 is about 6379.4855591968. The cubic root of 40697836 is about 343.9725392718.

The spelling of 40697836 in words is "forty million, six hundred ninety-seven thousand, eight hundred thirty-six".