40122240 has 64 divisors (see below), whose sum is σ = 127895760. Its totient is φ = 10698752.

The previous prime is 40122239. The next prime is 40122259. The reversal of 40122240 is 4222104.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8529 + ... + 12368.

Almost surely, 2^40122240 is an apocalyptic number.

40122240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40122240 is an abundant number, since it is smaller than the sum of its proper divisors (87773520).

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

40122240 is a wasteful number, since it uses less digits than its factorization.

40122240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20919 (or 20907 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 40122240 is about 6334.2118688910. The cubic root of 40122240 is about 342.3432141540.

Adding to 40122240 its reverse (4222104), we get a palindrome (44344344).

The spelling of 40122240 in words is "forty million, one hundred twenty-two thousand, two hundred forty".