40250280 has 64 divisors (see below), whose sum is σ = 138003840. Its totient is φ = 9199872.

The previous prime is 40250251. The next prime is 40250281. The reversal of 40250280 is 8205204.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (40250281) 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, 23119 + ... + 24798.

It is an arithmetic number, because the mean of its divisors is an integer number (2156310).

Almost surely, 2^40250280 is an apocalyptic number.

40250280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40250280 is an abundant number, since it is smaller than the sum of its proper divisors (97753560).

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

40250280 is a wasteful number, since it uses less digits than its factorization.

40250280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47938 (or 47934 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 40250280 is about 6344.3108372778. The cubic root of 40250280 is about 342.7069947708.

Adding to 40250280 its reverse (8205204), we get a palindrome (48455484).

The spelling of 40250280 in words is "forty million, two hundred fifty thousand, two hundred eighty".