40759821 has 8 divisors (see below), whose sum is σ = 60384960. Its totient is φ = 27173196.

The previous prime is 40759801. The next prime is 40759867. The reversal of 40759821 is 12895704.

40759821 is a `hidden beast` number, since 40 + 7 + 598 + 21 = 666.

It is not a de Polignac number, because 40759821 - 2⁶ = 40759757 is a prime.

It is a super-2 number, since 2×40759821² = 3322726015904082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40759801) 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, 754785 + ... + 754838.

It is an arithmetic number, because the mean of its divisors is an integer number (7548120).

Almost surely, 2^40759821 is an apocalyptic number.

It is an amenable number.

40759821 is a deficient number, since it is larger than the sum of its proper divisors (19625139).

40759821 is a wasteful number, since it uses less digits than its factorization.

40759821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509632 (or 1509626 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 40759821 is about 6384.3418611475. The cubic root of 40759821 is about 344.1470802685.

It can be divided in two parts, 407598 and 21, that multiplied together give a palindrome (8559558).

The spelling of 40759821 in words is "forty million, seven hundred fifty-nine thousand, eight hundred twenty-one".