40028841 has 6 divisors (see below), whose sum is σ = 57819450. Its totient is φ = 26685888.

The previous prime is 40028837. The next prime is 40028861. The reversal of 40028841 is 14882004.

It can be written as a sum of positive squares in only one way, i.e., 33977241 + 6051600 = 5829^2 + 2460^2 .

It is not a de Polignac number, because 40028841 - 2² = 40028837 is a prime.

It is a super-2 number, since 2×40028841² = 3204616223606562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40028861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2223816 + ... + 2223833.

It is an arithmetic number, because the mean of its divisors is an integer number (9636575).

Almost surely, 2^40028841 is an apocalyptic number.

It is an amenable number.

40028841 is a deficient number, since it is larger than the sum of its proper divisors (17790609).

40028841 is a wasteful number, since it uses less digits than its factorization.

40028841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4447655 (or 4447652 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 40028841 is about 6326.8349907359. The cubic root of 40028841 is about 342.0773652820.

It can be divided in two parts, 400 and 28841, that added together give a square (29241 = 171²).

The spelling of 40028841 in words is "forty million, twenty-eight thousand, eight hundred forty-one".