1400388 has 36 divisors (see below), whose sum is σ = 3599568. Its totient is φ = 420240.

The previous prime is 1400387. The next prime is 1400411. The reversal of 1400388 is 8830041.

It is a super-2 number, since 2×1400388² = 3922173101088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1400383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13545 + ... + 13647.

It is an arithmetic number, because the mean of its divisors is an integer number (99988).

2^1400388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1400388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1799784).

1400388 is an abundant number, since it is smaller than the sum of its proper divisors (2199180).

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

1400388 is a wasteful number, since it uses less digits than its factorization.

1400388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1400388 is about 1183.3799051868. The cubic root of 1400388 is about 111.8792278086.

The spelling of 1400388 in words is "one million, four hundred thousand, three hundred eighty-eight".