40145400 has 72 divisors (see below), whose sum is σ = 134827680. Its totient is φ = 10704960.

The previous prime is 40145389. The next prime is 40145411. The reversal of 40145400 is 454104.

It is an interprime number because it is at equal distance from previous prime (40145389) and next prime (40145411).

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×40145400² = 3223306282320000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9352 + ... + 12951.

Almost surely, 2^40145400 is an apocalyptic number.

40145400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40145400 is an abundant number, since it is smaller than the sum of its proper divisors (94682280).

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

40145400 is a wasteful number, since it uses less digits than its factorization.

40145400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22325 (or 22313 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40145400 is about 6336.0397726024. The cubic root of 40145400 is about 342.4090724224.

Adding to 40145400 its reverse (454104), we get a palindrome (40599504).

The spelling of 40145400 in words is "forty million, one hundred forty-five thousand, four hundred".