40102445 has 16 divisors (see below), whose sum is σ = 51839040. Its totient is φ = 29683584.

The previous prime is 40102441. The next prime is 40102453. The reversal of 40102445 is 54420104.

It is a cyclic number.

It is not a de Polignac number, because 40102445 - 2² = 40102441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40102441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 824 + ... + 8993.

It is an arithmetic number, because the mean of its divisors is an integer number (3239940).

Almost surely, 2^40102445 is an apocalyptic number.

It is an amenable number.

40102445 is a deficient number, since it is larger than the sum of its proper divisors (11736595).

40102445 is a wasteful number, since it uses less digits than its factorization.

40102445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9884.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 40102445 is about 6332.6491297087. The cubic root of 40102445 is about 342.2869045803.

Adding to 40102445 its reverse (54420104), we get a palindrome (94522549).

The spelling of 40102445 in words is "forty million, one hundred two thousand, four hundred forty-five".