40778120 has 16 divisors (see below), whose sum is σ = 91750860. Its totient is φ = 16311232.

The previous prime is 40778119. The next prime is 40778131. The reversal of 40778120 is 2187704.

It can be written as a sum of positive squares in 2 ways, for example, as 34597924 + 6180196 = 5882^2 + 2486^2 .

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, 509687 + ... + 509766.

Almost surely, 2^40778120 is an apocalyptic number.

40778120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40778120 is an abundant number, since it is smaller than the sum of its proper divisors (50972740).

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

40778120 is a wasteful number, since it uses less digits than its factorization.

40778120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019464 (or 1019460 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 40778120 is about 6385.7748159483. The cubic root of 40778120 is about 344.1985738316.

The spelling of 40778120 in words is "forty million, seven hundred seventy-eight thousand, one hundred twenty".