40019650 has 24 divisors (see below), whose sum is σ = 81204624. Its totient is φ = 14552400.

The previous prime is 40019633. The next prime is 40019659. The reversal of 40019650 is 5691004.

It is a super-2 number, since 2×40019650² = 3203144772245000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (40019659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35832 + ... + 36931.

It is an arithmetic number, because the mean of its divisors is an integer number (3383526).

Almost surely, 2^40019650 is an apocalyptic number.

40019650 is an abundant number, since it is smaller than the sum of its proper divisors (41184974).

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

40019650 is a wasteful number, since it uses less digits than its factorization.

40019650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72786 (or 72781 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 40019650 is about 6326.1085984988. The cubic root of 40019650 is about 342.0511818798.

The spelling of 40019650 in words is "forty million, nineteen thousand, six hundred fifty".