40898978 has 4 divisors (see below), whose sum is σ = 61348470. Its totient is φ = 20449488.

The previous prime is 40898969. The next prime is 40898981. The reversal of 40898978 is 87989804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 32296489 + 8602489 = 5683^2 + 2933^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10224743 + ... + 10224746.

Almost surely, 2^40898978 is an apocalyptic number.

40898978 is a deficient number, since it is larger than the sum of its proper divisors (20449492).

40898978 is a wasteful number, since it uses less digits than its factorization.

40898978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20449491.

The product of its (nonzero) digits is 1161216, while the sum is 53.

The square root of 40898978 is about 6395.2308793350. The cubic root of 40898978 is about 344.5382831467.

The spelling of 40898978 in words is "forty million, eight hundred ninety-eight thousand, nine hundred seventy-eight".