40690128 has 40 divisors (see below), whose sum is σ = 109689408. Its totient is φ = 12973312.

The previous prime is 40690123. The next prime is 40690147. The reversal of 40690128 is 82109604.

It is a junction number, because it is equal to n+sod(n) for n = 40690095 and 40690104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40690123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17325 + ... + 19532.

Almost surely, 2^40690128 is an apocalyptic number.

40690128 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40690128 is an abundant number, since it is smaller than the sum of its proper divisors (68999280).

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

40690128 is a wasteful number, since it uses less digits than its factorization.

40690128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36891 (or 36885 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 40690128 is about 6378.8814066418. The cubic root of 40690128 is about 343.9508222470.

The spelling of 40690128 in words is "forty million, six hundred ninety thousand, one hundred twenty-eight".