40142448 has 30 divisors (see below), whose sum is σ = 112343504. Its totient is φ = 13380768.

The previous prime is 40142419. The next prime is 40142449. The reversal of 40142448 is 84424104.

It is a happy number.

It is a super-2 number, since 2×40142448² = 3222832262865408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40142449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139240 + ... + 139527.

Almost surely, 2^40142448 is an apocalyptic number.

40142448 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40142448 is an abundant number, since it is smaller than the sum of its proper divisors (72201056).

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

40142448 is a wasteful number, since it uses less digits than its factorization.

40142448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278781 (or 278772 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 40142448 is about 6335.8068152367. The cubic root of 40142448 is about 342.4006794612.

It can be divided in two parts, 401 and 42448, that added together give a square (42849 = 207²).

The spelling of 40142448 in words is "forty million, one hundred forty-two thousand, four hundred forty-eight".