40378620 has 24 divisors (see below), whose sum is σ = 113060304. Its totient is φ = 10767616.

The previous prime is 40378619. The next prime is 40378627. The reversal of 40378620 is 2687304.

40378620 = T₂₉₉₁ + T₂₉₉₂ + ... + T₂₉₉₉.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40378627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336429 + ... + 336548.

It is an arithmetic number, because the mean of its divisors is an integer number (4710846).

Almost surely, 2^40378620 is an apocalyptic number.

It is an amenable number.

40378620 is an abundant number, since it is smaller than the sum of its proper divisors (72681684).

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

40378620 is a wasteful number, since it uses less digits than its factorization.

40378620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672989 (or 672987 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 40378620 is about 6354.4173611748. The cubic root of 40378620 is about 343.0708543598.

The spelling of 40378620 in words is "forty million, three hundred seventy-eight thousand, six hundred twenty".