40070900 has 36 divisors (see below), whose sum is σ = 88392780. Its totient is φ = 15763200.

The previous prime is 40070893. The next prime is 40070903. The reversal of 40070900 is 907004.

It can be written as a sum of positive squares in 6 ways, for example, as 1779556 + 38291344 = 1334^2 + 6188^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40070903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2816 + ... + 9384.

It is an arithmetic number, because the mean of its divisors is an integer number (2455355).

Almost surely, 2^40070900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40070900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44196390).

40070900 is an abundant number, since it is smaller than the sum of its proper divisors (48321880).

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

40070900 is a wasteful number, since it uses less digits than its factorization.

40070900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6644 (or 6637 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 40070900 is about 6330.1579759118. The cubic root of 40070900 is about 342.1971322254.

Adding to 40070900 its reverse (907004), we get a palindrome (40977904).

The spelling of 40070900 in words is "forty million, seventy thousand, nine hundred".