1017881940 has 48 divisors (see below), whose sum is σ = 2868969600. Its totient is φ = 269635200.

The previous prime is 1017881923. The next prime is 1017881957. The reversal of 1017881940 is 491887101.

It is an interprime number because it is at equal distance from previous prime (1017881923) and next prime (1017881957).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47115 + ... + 65234.

It is an arithmetic number, because the mean of its divisors is an integer number (59770200).

Almost surely, 2^1017881940 is an apocalyptic number.

1017881940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1017881940 is an abundant number, since it is smaller than the sum of its proper divisors (1851087660).

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

1017881940 is a wasteful number, since it uses less digits than its factorization.

1017881940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112512 (or 112510 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 39.

The square root of 1017881940 is about 31904.2620977198. The cubic root of 1017881940 is about 1005.9254661674.

The spelling of 1017881940 in words is "one billion, seventeen million, eight hundred eighty-one thousand, nine hundred forty".