40143280 has 40 divisors (see below), whose sum is σ = 97395552. Its totient is φ = 15358464.

The previous prime is 40143277. The next prime is 40143287. The reversal of 40143280 is 8234104.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×40143280² = 3222965858316800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40143287) 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, 9069 + ... + 12748.

Almost surely, 2^40143280 is an apocalyptic number.

40143280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40143280 is an abundant number, since it is smaller than the sum of its proper divisors (57252272).

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

40143280 is a wasteful number, since it uses less digits than its factorization.

40143280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21853 (or 21847 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 40143280 is about 6335.8724734641. The cubic root of 40143280 is about 342.4030449987.

Adding to 40143280 its reverse (8234104), we get a palindrome (48377384).

It can be divided in two parts, 401 and 43280, that added together give a square (43681 = 209²).

The spelling of 40143280 in words is "forty million, one hundred forty-three thousand, two hundred eighty".