1401111378 has 32 divisors (see below), whose sum is σ = 3248956800. Its totient is φ = 446730768.

The previous prime is 1401111377. The next prime is 1401111403. The reversal of 1401111378 is 8731111041.

It is a super-2 number, since 2×1401111378² = 3926226187122117768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1401111377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 562813 + ... + 565296.

It is an arithmetic number, because the mean of its divisors is an integer number (101529900).

Almost surely, 2^1401111378 is an apocalyptic number.

1401111378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1401111378 is an abundant number, since it is smaller than the sum of its proper divisors (1847845422).

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

1401111378 is a wasteful number, since it uses less digits than its factorization.

1401111378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128143 (or 1128137 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 27.

The square root of 1401111378 is about 37431.4223347177. The cubic root of 1401111378 is about 1118.9848843274.

The spelling of 1401111378 in words is "one billion, four hundred one million, one hundred eleven thousand, three hundred seventy-eight".