40629840 has 160 divisors (see below), whose sum is σ = 134086656. Its totient is φ = 10160640.

The previous prime is 40629833. The next prime is 40629863. The reversal of 40629840 is 4892604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 319857 + ... + 319983.

Almost surely, 2^40629840 is an apocalyptic number.

40629840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40629840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67043328).

40629840 is an abundant number, since it is smaller than the sum of its proper divisors (93456816).

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

40629840 is a wasteful number, since it uses less digits than its factorization.

40629840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 40629840 is about 6374.1540615206. The cubic root of 40629840 is about 343.7808681922.

The spelling of 40629840 in words is "forty million, six hundred twenty-nine thousand, eight hundred forty".