40018898 has 8 divisors (see below), whose sum is σ = 62098380. Its totient is φ = 19319440.

The previous prime is 40018859. The next prime is 40018907. The reversal of 40018898 is 89881004.

It can be written as a sum of positive squares in 2 ways, for example, as 37982569 + 2036329 = 6163^2 + 1427^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344933 + ... + 345048.

Almost surely, 2^40018898 is an apocalyptic number.

40018898 is a deficient number, since it is larger than the sum of its proper divisors (22079482).

40018898 is a wasteful number, since it uses less digits than its factorization.

40018898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690012.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 40018898 is about 6326.0491619968. The cubic root of 40018898 is about 342.0490393981.

The spelling of 40018898 in words is "forty million, eighteen thousand, eight hundred ninety-eight".