40102398 has 64 divisors (see below), whose sum is σ = 102481920. Its totient is φ = 11386656.

The previous prime is 40102393. The next prime is 40102411. The reversal of 40102398 is 89320104.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40102393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 104515 + ... + 104897.

It is an arithmetic number, because the mean of its divisors is an integer number (1601280).

Almost surely, 2^40102398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40102398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51240960).

40102398 is an abundant number, since it is smaller than the sum of its proper divisors (62379522).

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

40102398 is a wasteful number, since it uses less digits than its factorization.

40102398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 40102398 is about 6332.6454187804. The cubic root of 40102398 is about 342.2867708603.

The spelling of 40102398 in words is "forty million, one hundred two thousand, three hundred ninety-eight".